CHEM 120 EXAM 2 LATEST UPDATE 2025 /
2026) Review Questions & Answers [score
A] 100% Correct - Chamberlain
What is the molar mass of CaSO₄?
a.) 232.35 g/mol
b.) 136.14 g/mol
c.) 104.08 g/mol
d.) 82.12 g/mol
b.) 136.14 g/mol
b.) 136.14 g/mol
Based on the balanced chemical equation: 2 NH₃ + 3 CuO→ 3 Cu + N₂ + H₂O
Which of the following statements is NOT true:
a.) CuO is a reactant
b.) H₂O is a reactant
c.) NH₃ is a reactant
d.) Cu is a product
H₂O is a reactant
How many atoms of oxygen are there in the molecule Al₂(SO₄)₃?
a.) 12
b.) 4
c.) 3
d.) 7
a.) 12
How many grams of H₂O are in 0.2 moles of H₂O (molar mass 18.01 g/mol)?
a.) 3.6 grams
b.) 1.8 grams
c.) 0.45 grams
d.) 0.02 grams
a.) 3.6 g/mol
What allows us to convert from moles of one substance to moles of another
substance?
a.) formula mass
b.) molecular mass
c.) a conversion table
d.) a balanced chemical equation
d.) a balanced chemical equation
, CHEM 120 EXAM 2 LATEST UPDATE 2025 /
2026) Review Questions & Answers [score
A] 100% Correct - Chamberlain
Balance the reaction V + O₂ → When balanced, what is the coefficient in front of the V?
a.) 1
b.) 4
c.) 2
d.) 3
c.) 2
What is the balanced form of the reaction: FeCl₃ + NaOH → Fe(OH)₃ + NaCl
a.) FeCl₃ + 2 NaOH → Fe(OH)₃ + 2 NaCl
b.) 2 FeCl₃ + 3 NaOH → 2 Fe(OH)₃ + 3 NaCl
c.) FeCl₃ + NaOH → Fe(OH)₃ + NaCl
d.) FeCl₃ + 3 NaOH → Fe(OH)₃ + 3 NaCl
d.) FeCl₃ + 3 NaOH → Fe(OH)₃ + 3 NaCl
2 moles of AlCl₃ were reacted as shown by the balanced reaction below.
How many moles of MgCl₂ formed?
2 AlCl₃ + Mg₃P₂ → 2 AlP + 3 MgCl₂
a.) 15.6 moles of MgCl₂
b.) 7.8 moles of MgCl₂
c.) 3.4 moles of MgCl₂
d.) 5.2 moles of MgCl₂
b.) 7.8 moles of MgCl₂
A chemist dissolves 24 grams of CaCl₂ (molecular mass 110.98 g/mol) in water to
prepare a solution with a total volume of 360 mL.
What is the molarity of this solution?
a.) 308 M
b.) 66.7 M
c.) 0.0006 M
d.) 0.6 M
e.) 0.3 M
d.) 0.6 M
What formula would you use to prepare a dilute solution from a concentrated solution?
a.) M= mol/L
b.) C₁V₁= C₂V₂
2026) Review Questions & Answers [score
A] 100% Correct - Chamberlain
What is the molar mass of CaSO₄?
a.) 232.35 g/mol
b.) 136.14 g/mol
c.) 104.08 g/mol
d.) 82.12 g/mol
b.) 136.14 g/mol
b.) 136.14 g/mol
Based on the balanced chemical equation: 2 NH₃ + 3 CuO→ 3 Cu + N₂ + H₂O
Which of the following statements is NOT true:
a.) CuO is a reactant
b.) H₂O is a reactant
c.) NH₃ is a reactant
d.) Cu is a product
H₂O is a reactant
How many atoms of oxygen are there in the molecule Al₂(SO₄)₃?
a.) 12
b.) 4
c.) 3
d.) 7
a.) 12
How many grams of H₂O are in 0.2 moles of H₂O (molar mass 18.01 g/mol)?
a.) 3.6 grams
b.) 1.8 grams
c.) 0.45 grams
d.) 0.02 grams
a.) 3.6 g/mol
What allows us to convert from moles of one substance to moles of another
substance?
a.) formula mass
b.) molecular mass
c.) a conversion table
d.) a balanced chemical equation
d.) a balanced chemical equation
, CHEM 120 EXAM 2 LATEST UPDATE 2025 /
2026) Review Questions & Answers [score
A] 100% Correct - Chamberlain
Balance the reaction V + O₂ → When balanced, what is the coefficient in front of the V?
a.) 1
b.) 4
c.) 2
d.) 3
c.) 2
What is the balanced form of the reaction: FeCl₃ + NaOH → Fe(OH)₃ + NaCl
a.) FeCl₃ + 2 NaOH → Fe(OH)₃ + 2 NaCl
b.) 2 FeCl₃ + 3 NaOH → 2 Fe(OH)₃ + 3 NaCl
c.) FeCl₃ + NaOH → Fe(OH)₃ + NaCl
d.) FeCl₃ + 3 NaOH → Fe(OH)₃ + 3 NaCl
d.) FeCl₃ + 3 NaOH → Fe(OH)₃ + 3 NaCl
2 moles of AlCl₃ were reacted as shown by the balanced reaction below.
How many moles of MgCl₂ formed?
2 AlCl₃ + Mg₃P₂ → 2 AlP + 3 MgCl₂
a.) 15.6 moles of MgCl₂
b.) 7.8 moles of MgCl₂
c.) 3.4 moles of MgCl₂
d.) 5.2 moles of MgCl₂
b.) 7.8 moles of MgCl₂
A chemist dissolves 24 grams of CaCl₂ (molecular mass 110.98 g/mol) in water to
prepare a solution with a total volume of 360 mL.
What is the molarity of this solution?
a.) 308 M
b.) 66.7 M
c.) 0.0006 M
d.) 0.6 M
e.) 0.3 M
d.) 0.6 M
What formula would you use to prepare a dilute solution from a concentrated solution?
a.) M= mol/L
b.) C₁V₁= C₂V₂
